Rather than simply performing number crunching, the benchmarks test for stuff users are likely to do, such as redrawing the ArtWorks apple, compressing files with SparkFS, and rendering text in Insignia. In most tests the Iyonix clocks in twice as fast as the Omega (perhaps unsurprising considering the 600Mhz vs 300Mhz processors) and the Omega runs a tad faster than a StrongARM Risc PC.
Worringly, converting a large JPEG to PNG in Creator is far slower on the Omega than a Risc PC - although the Iyonix isn't that much faster than the Risc PC either. The Omega also performs badly in a file compression test - which may indicate issues with the UDMA hard disc interface need to be resolved. For balance, apparently the Omega performs better than the Iyonix in certain situations, according to RISC OS Ltd (see Drobe's show report).
Of course, the Omega's design allows the potential for future enhancements - along with such trivial matters like networking, USB and XScale support. At least the floppy drive jolly well works now.
Please don't let them make me be a monkey butler